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* ui: show locked API key environment reference * fix(ui-settings-models): skip unused pi-ai credential reference * fix(ui-settings-models): show active provider auth source * test(llm): cover provider auth check failures * docs(ui-settings-models): clarify active provider authentication * test(web): update model key copy snapshots * fix(ui-settings-models): clarify native authentication source hint * fix: address PR 5483 review feedback * docs(llm): state empty auth lookup behavior * fix: refresh auth hints with credential snapshots * fix: require credential refresh revision * test: cover auth status projection * fix: refresh catalog and browser expectations after rebase * fix: keep auth status projection internal and explicit * fix: preserve credential source checks with signed-in account rows * test: pin Models authentication instead of inheriting host keys * fix: prioritize stored credentials across providers * fix: use one environment fallback hint * docs: refresh credential contract * docs: refresh config catalog * test: align provider hint verification * fix: use provider-native auth hints and endpoints * fix: cover oauth-capable provider auth hints * fix: show canonical endpoint defaults * fix: avoid misleading endpoint fallback * fix: label catalog endpoint defaults * fix: shorten auth hints with hover details * fix: clarify native auth resolution * test: align DeepSeek endpoint hint * fix: pair help button corner shape * fix: address credential precedence review Record the stored-credential precedence in a superseding Agent Note and an upgrade guide, and align the credentials subsystem page, package READMEs, and JSDoc with the order file > launch env > $cwd/.env > $DSH_HOME/.env. Report each pi-ai route's catalog endpoint and native-auth environment names through the provider directory, check the names against the installed pi-ai resolvers, and remove the llm/checkAuth and credential describe operations that no Models page code calls. Restore the route-derived key reference and the home expansion that reads the home directory only for a leading ~. * fix: clarify model authentication guidance * fix: explain native provider OAuth requirements * fix: keep authentication guidance method neutral * fix: show credential reference source in model editor * fix: use environment authentication in headless profile * fix: validate headless authentication and current provider metadata * test: retain authentication guidance coverage with account catalog updates * test: retain writable Models credentials with the pinned environment
DeepSeek Harness
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DeepSeek Harness (dsh) is an open-source agent harness developed by DeepSeek AI.
It is built on an everything-is-a-plugin architecture and powered by Cordis, whose design is described in A Programming Paradigm for Spatiotemporal Composability.
Documentation: https://deepseek-harness.github.io/deepseek-harness/
Developer preview
DeepSeek Harness is in developer preview and iterating rapidly. THERE WILL BE COMPATIBILITY-BREAKING CHANGES.
Review the safety notice before running the project.
Run
Run from npm
Install Node.js, then run:
npx @deepseek-ai/dsh web
The command starts the Web UI at http://127.0.0.1:3080 by default and opens it in the default browser for a local launch. An SSH launch only prints the host URL because the SSH client or editor owns the local forwarded address. Pass --no-open to run the server without opening a browser. See Web UI guide.
Run from source
To run from a repository checkout:
git clone https://github.com/deepseek-ai/deepseek-harness.git
cd deepseek-harness
pnpm install
pnpm run build
pnpm dsh web
pnpm run build prepares the repository artifacts. pnpm dsh web uses those built artifacts without rebuilding.
Community and support
- Submit feedback or bug reports through GitHub Discussions.
- Add the
dsh-plugintopic to your plugin repository for discoverability. - Join DeepSeek Harness Discord community.
Contributing
See CONTRIBUTING.md.
Development
Start with the development guide and architecture documentation.
pnpm run dev:web builds, serves, and rebuilds client bundles on source edits in one terminal, and make help lists the matching Make targets for Web and Desktop; the guide's application commands section owns the full table.
For agents, follow AGENTS.md.
Citation
@misc{deepseek-harness2026,
title={DeepSeek Harness: Everything is a Plugin},
author={DeepSeek-AI},
year={2026},
publisher={GitHub},
howpublished={\url{https://github.com/deepseek-ai/deepseek-harness}},
}
License
Third-party dependencies and their licenses are disclosed in THIRD_PARTY_NOTICES.md.